#ifndef __MD5_H__
#define __MD5_H__  
   
typedef struct  
{  
	unsigned int count[2];  
	unsigned int state[4];  
	unsigned char buffer[64];     
}MD5_CTX;  
   
						   
#define F(x,y,z) ((x & y) | (~x & z))  
#define G(x,y,z) ((x & z) | (y & ~z))  
#define H(x,y,z) (x^y^z)  
#define I(x,y,z) (y ^ (x | ~z))  
#define ROTATE_LEFT(x,n) ((x << n) | (x >> (32-n)))  

#define FF(a,b,c,d,x,s,ac){ \
		a += F(b,c,d) + x + ac; \
		a = ROTATE_LEFT(a,s); \
		a += b; \
		  }  
#define GG(a,b,c,d,x,s,ac){ \
		a += G(b,c,d) + x + ac; \
		a = ROTATE_LEFT(a,s); \
		a += b; \
		}  
#define HH(a,b,c,d,x,s,ac){ \
		a += H(b,c,d) + x + ac; \
		a = ROTATE_LEFT(a,s); \
		a += b; \
		}  
#define II(a,b,c,d,x,s,ac){ \
		a += I(b,c,d) + x + ac; \
		a = ROTATE_LEFT(a,s); \
		a += b; \
		}                                              

void MD5Init(MD5_CTX *context);  
void MD5Update(MD5_CTX *context,unsigned char *input,unsigned int inputlen);  
void MD5Final(MD5_CTX *context,unsigned char digest[16]);  
void MD5Transform(unsigned int state[4],unsigned char block[64]);  
void MD5Encode(unsigned char *output,unsigned int *input,unsigned int len);  
void MD5Decode(unsigned int *output,unsigned char *input,unsigned int len);  
   
#endif  //__MD5_H__
